Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having tangential inlet or outlet
Reexamination Certificate
1999-03-09
2001-09-25
Ryznic, John E. (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having tangential inlet or outlet
C415S900000
Reexamination Certificate
active
06293752
ABSTRACT:
BACKGROUND
Shear sensitive fluids, including biological fluids such as blood and blood-based combinations, should not be exposed to sudden or extreme changes in pressure or temperature, impacts, vibration, or rapid changes in direction of flow. Nonturbulent flow is the preferred mode of handling shear sensitive fluids.
DISCLOSURE OF THE INVENTION
The invention is a biological fluid transport device comprising a cutwater at the junction of at least two fluid paths or circuits, the cutwater being substantially straight, or substantially vertical, or both. The junction is the location where a fluid path is split into two or more paths. For example, the junction can be an outlet for fluid to leave a device or an inlet for fluid to enter a device. At least one of the fluid paths or circuits may be tubular, and in some embodiments all of the fluid paths or circuits are tubular. The shear sensitive fluid may be, without Limitation, blood, blood-based combinations such as “platelet gel,” cell culture media, cell suspensions, proteins, and microcapsule suspensions. The device may be part of an extracorporeal bypass circuit but it need not be. Preferred embodiments of the device include, without limitation, kinetic pumps, mass transfer devices, filters, reservoirs, heat exchangers, and blood processing systems (such as diagnostic hemostasis management systems and blood coagulation testing systems).
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Clague Cynthia T.
Dorman Frank D.
Hamlen Robert C.
Hegeman, III Donald W.
Miller Timothy A.
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